Suddenly measuring large. 3 weeks ahead

Kristina
Anyone else measuring large? I'm 32 weeks and have been spot on each visit for fundal height. I've never even been off by even a centimeter. Today I went in for my 32 week visit and I was told I'm Measuring 35-36 weeks(35-36cm). They ordered a growth scan for my next visit in 2 weeks. I know fundal height isn't an exact science. I also know that the growth scans aren't either, even though they are normally a bit more accurate that fundal height. Like most FTMs my big fear is delivering early/ Newly formed GD/ or needing a C section.
Anyone else in a similar situation ? How is your dr managing the situation ? 
Thanks everyone!